#Acanthaceae

• Acanthus — A perennial herbaceous plant in the Acanthus genus, Acanthaceae family, native to the Mediterranean region and tropical zones, characterized by large, deeply incised, often spiny leaves and tall spike-like inflorescences with white, purple, or pink flowers. In horticulture, it is cultivated as an ornamental backdrop plant due to its imposing architecture, being also the plant whose leaves served as the historical model for creating the famous architectural ornament of the Corinthian order.
• Acanthaceae — The large botanical family of dicotyledonous plants (Acanthaceae) within the Lamiales order, comprising hundreds of genera and thousands of species of herbs, shrubs, and vines, primarily distributed across tropical and subtropical global regions. Morphologically, these plants are characterized by simple, opposite leaves, spike- or raceme-type inflorescences equipped with large, often intensely colored bracts, and dehiscent capsule fruits remarkable for their explosive seed expulsion mechanism.
• Acanthaceous — A botanical term used as an adjective to describe a plant, a morphological character, or an anatomical structure that belongs to the acanthaceae family or displays structural similarities with plants in this family. As a masculine noun, it defines an isolated specimen or any member of the Acanthaceae family, used in specialized scientific texts to facilitate comparative descriptions among taxa.
• Acanthus — The type genus of the Acanthaceae family, comprising around 30 species of perennial herbaceous plants or shrubs native to the temperate and tropical regions of Southern Europe, Africa, and Asia. The plants are recognized by their majestic, deeply lobed, and frequently spiny leaves, and by their erect, dense flower spikes bearing bilabiate flowers. Its name holds immense cultural resonance, as its leaves served as the unchanging historical model for Corinthian and Composite architectural capitals.
• Acanthus arboreus — A species of erect shrub or small tree in the Acanthus genus, native to the tropical regions of East and Northeast Africa (such as Ethiopia, Sudan, Kenya, and Uganda). Unlike the predominantly herbaceous species of this genus, this taxon develops vigorous woody stems that can reach heights of 4 to 6 meters. It is characterized by large, deeply lobed, and heavily spiny leaves, and spectacular dense terminal flower spikes with large, bright pink or purple flowers protected by serrated green bracts.
• Acanthus carolialexandri — A rare species of perennial herbaceous plant in the Acanthus genus, native to the Balkan Peninsula (endemic to certain arid and mountainous regions of Greece). The taxon is characterized by leaves tightly arranged in a basal rosette with sharp lobes, and rigid flower stalks bearing flowers protected by spiny bracts. It represents a niche floristic element adapted to rocky Mediterranean microclimates, primarily described and studied in East European phytotaxonomic literature.
• Acanthus longifolius — A species of perennial herbaceous plant in the Acanthus genus, Acanthaceae family, native to the Balkan Peninsula and neighboring regions of Southeastern Europe. It stands out for its unusually long, elegant, deeply and sinuously lobed leaves, which lack aggressive spines at their tips. This massive foliar structure forms a dense basal rosette from whose center rigid flower stalks rise in early summer, bearing spectacular spike-like inflorescences with white or purple bilabiate flowers framed by large, colorful bracts.
• Acanthus montanus — A species of evergreen perennial subshrub with partially woody bases, belonging to the Acanthus genus and Acanthaceae family, native to the tropical rainforests and shaded mountainous areas of West and Central Africa. It is distinguished by its large, deeply lobed, and heavily undulated leaves, whose margins are armed with sharp, rigid spines. Its inflorescences are spectacular erect terminal spikes made of white, pale pink, or light lilac tubular flowers, valued in horticulture for its exotic and sculptural appearance.
• Adhatoda — A botanical term designating a genus of plants (or a section within the genus Justicia, specifically the species Justicia adhatoda), a medicinal perennial shrub native to the tropical regions of Asia. The plant is structurally recognized in Ayurvedic medicine for its leaves rich in alkaloids (such as vasicine), widely used in preparing therapeutic remedies for respiratory disorders due to strong expectorant and bronchodilator properties.
• Aphelandra — A genus of tropical ornamental plants native to the warm regions of Central and South America, belonging to the family Acanthaceae. It comprises approximately 170 species of shrubs and perennials, remarkable for their decorative foliage, often with intensely colored or white/silver striped veins, and their spectacular yellow, red, or orange spike-like inflorescences.
• Aphelandra liboniana — A species of perennial tropical plant in the genus Aphelandra, native to the humid forests of Brazil. It is cultivated internationally as an ornamental plant, valued for its large, ovate, deep green leaves and its spectacular spike-like inflorescences consisting of reddish-orange bracts from which yellow flowers emerge.
• Aphelandra nitens — An exotic plant species in the genus Aphelandra, native to the tropical jungles of Colombia. It is highly renowned in horticulture due to its spectacular leaves, which feature a leathery texture and an intense metallic gloss, deep bronze-green on the upper surface and rich purple underneath, complemented by a fiery red inflorescence.
• Asystasia — A genus of flowering plants in the family Acanthaceae, containing approximately 70 species native to tropical and subtropical regions of Africa, Asia, and Australia. Many species, such as Asystasia gangetica, are cultivated as ornamental plants due to their attractive funnel-shaped flowers, but can become invasive in sensitive habitats.
• Ganges primrose — A species of perennial herbaceous, climbing or creeping plant in the family Acanthaceae, native to tropical Asia and Africa, but widely naturalized in other warm regions of the world. It is recognized by its rapid growth rate, opposite ovate leaves, and attractive funnel-shaped flowers, whose colors range from white and light yellow to pale violet shades, being utilized as an ornamental or medicinal plant, but considered an invasive weed in certain island ecosystems.
• Climbing asystasia — A climbing plant species in the genus Asystasia, family Acanthaceae, native particularly to the forested areas and tropical regions of West Africa. It is distinguished by its long, flexible shoots that lean on surrounding vegetation to reach the light, having glossy leaves and compact terminal inflorescences with tubular flowers, often white or cream, adapted for pollination by large insects in the forest canopy.